Physical and optical properties
Chemical formula | LiNbO3 |
Crystal structure | trigonal |
Space group | R3C |
Density | 4.64 g/cm3 |
Mohs hardness | 5 |
Optical homogeneity | ~ 5 x 10-5 / cm |
Transparency range | 420 5200 nm |
Absorption coefficient | ~ 0.1 % / cm @ 1064 nm |
Refractive indices at 1064 nm | ne = 2.146, no = 2.220 @ 1300 nm |
ne = 2.156, no = 2.232 @ 1064 nm | |
ne = 2.203, no = 2.286 @ 632.8 nm | |
Sellmeier equations (, m) | no2 = 4.9048 + 0.11768 / (2 0.04750) 0.0271692 |
ne2 = 4.5820 + 0.099169 / (2 0.04443) 0.0219502 | |
Thermal expansion coefficient @ 25 °C | //a, 2.0 x 10-6 / K |
//c, 2.2 x 10-6 / K | |
Thermal conductivity | ~ 5 W/m/K @ 25 °C |
Thermal optical coefficient | dno/dT = -0.874 x 10-6 / K at 1.4 m |
dne/dT = 39.073 x 10-6 / K at 1.4 m |
LiNbO3 General specification for Q-Switch
Refractive retardation | =Lnr22V/d |
Electro-optic coefficients | R33=32pm/V |
R31=10pm/V | |
R22=6.8 pm/V | |
Aperture | 4x4mm ~ 9x9mm |
Length | 15~25mm |
Tolerance of size | +/-0.1mm |
Chamfer | <0.5mm x 45° |
Accuracy of orientation | <5 arc min |
Parallelism | <10 arc sec |
Flatness | l/8 at 632.8 nm |
Wavefront Distortion | <l/4 at 632.8 nm |
Extinction Ratio | >400:1 @ 633nm, dia 6mm beam |
LiNbO3 specification for Optical waveguide
Operating wavelength range | 1.525-1.605m |
Extinction ratio | <20dB |
Half wave voltage | <6V |
DC bias voltage | <8V |
Input characteristic impedance | 50 |
Light reflection | ≤-50dB |
Maximum input electric power | 20dBm |
Maximum input optical power | 10-100mW |
Storage temperature | -40-85℃ |
Operating temperature | -40-70℃ |